What do these two signs of rain mean in the weather forecast?

The second one: heavy rain

The weather symbol is a simple weather symbol, which is used to represent the current weather phenomenon. Common weather symbols include rain, sunshine and fog. The weather represented by weather symbols is graphically represented, which can quickly distinguish the current weather situation. Dynamic weather symbols are generally used to represent the weather situation in weather forecast videos.

Extended data 1, symbol of weather phenomenon

When observing a certain weather phenomenon, meteorological observers should record the corresponding symbols in the "Weather Phenomenon" column of the observation record book of the day, except for a few phenomena, and also record the starting and ending time. Based on these symbols, combined with the intensity, coexistence and some characteristics of weather phenomena, a group of symbols that can be filled in weather maps are called cartographic symbols.

2. Weather graphic symbols

In order to make it easy for the public to understand and identify, a set of images and graphs representing weather phenomena has been formulated for TV or other public media.

References:

Baidu encyclopedia-weather symbols